Why can deep-water planes float and sink freely in the water?

In order to meet the needs of landing operations under high-tech conditions, the armies of various countries continue to apply high-tech to landing tools, inserting wings for aircraft and ships to take off at sea, and the surprise soldiers in future landing operations-underwater aircraft and ships surfaced.

First of all, the seaplane landing pioneer

Seaplane is a kind of aircraft that can take off and land on the water at will and has a large carrying capacity. Seaplanes can not only detect, search and attack underwater submarines, but also quickly assault and bomb surface ships; It can not only patrol the alert, but also cover the safety of important targets at sea and rescue and salvage drowning people at sea; It can not only transport personnel and equipment on water, but also drop and land vertically. In a word, seaplane is a widely used combat weapon that integrates combat and support, especially its take-off and landing is not limited by oceans and lakes, and it has strong maneuverability. At present, the troops that have been equipped in the world are: water bombers, water reconnaissance planes, water anti-submarine patrol aircraft, water fighters, water transport planes, sea rescue machines, water fire extinguishers and so on. In the future, seaplanes will comprehensively use various stealth technologies to reduce the physical signal characteristics such as radar, infrared, sound, light and electromagnetism, and apply more advanced integrated electric superconducting propulsion system to eliminate noise and reduce infrared radiation, thus greatly improving the stealth ability, rapid maneuverability and penetration ability of seaplanes; Equip air, sea and ground weapons and equipment to carry out dynamic strikes; It has many functions such as docking, retrogression, vertical take-off and landing. Armed with missiles, it can carry out all-round rapid attacks.

Second, underwater aircraft-amphibious operations

An underwater plane can fly in the sky like an airplane and descend in the water like a submarine, which is a combination of the functions of an airplane and a submarine. Since World War II, some developed countries in the world have been engaged in the research and design of underwater vehicles. In the mid-1960s, the United States developed the first underwater plane, which can fly in the sky, climb in the water and dive in the water. It was called "amphibious combat aircraft" at that time. By the end of 1960s, the United States had developed a new type of underwater plane. This kind of aircraft is made of high-strength super-composite materials, powered by high-energy and high-density batteries, and can dive to the seabed 6 kilometers deep at a speed of 22 nautical miles per hour. With the development of amphibious technology, in the future, underwater aircraft will make comprehensive use of the advantages of both ships and aircraft, integrating high speed, concealment and aggression, which can not only fly over the sea at high speed, but also make effective use of radar blind spots, making it difficult for the other side to find footprints. It can not only maneuver in the water, attack from the water surface and water, but also fly close to the sea surface and carry out precise strikes. This unique advantage and powerful penetration ability are far from being compared with ordinary combat ships and aircraft. Because of its small size, flexible operation and good maneuverability, it is not easy to be discovered by the enemy. Before the landing operation, the underwater plane can use the bad weather to maneuver secretly and complete various tactical tasks.

Third, the diving plane-submarine nemesis

Submersible aircraft is a multi-purpose aircraft, which can sail underwater, take off, land and slide on the water surface, and also fly in the air. It has the characteristics of submarine, surface ship and aircraft at the same time, so these characteristics must be combined systematically and skillfully in design and manufacture. This kind of aircraft mainly uses jet engines when flying in the air, and underwater propulsion power devices when sneaking underwater. The fuselage of the submersible is made of high-strength alloy material, in order to make the submersible resistant to water pressure. So the weight of the plane will be much larger than that of the current seaplane. At present, the submersible under research and test is mainly used in anti-submarine warfare. The aircraft can dive into the water first, closely monitor the underwater activities of enemy submarines, and then accurately attack enemy submarines.

Fourth, the deep-water plane-Hailong

At present, the world's military powers are conducting in-depth research on deep-water aircraft, making breakthroughs in aircraft diving technology and actively developing deep-water aircraft. This kind of aircraft can dive and take off, and it is a new type of aircraft that integrates the functions of submarine and aircraft. The shape of deep-water aircraft is somewhat different from that of ordinary aircraft. The wings of ordinary aircraft bend downward, which can generate upward lift to support the weight of the aircraft; The wings of deep-water aircraft are bent upwards, which can generate downward force and dive quickly. In order to solve the problem of upward rise, a flap is added to the trailing edge of the wing. When the flap is opened upwards, it can generate a lifting force and make it float on the water. In terms of flight principle, deep-water aircraft are very similar to ordinary aircraft. Ordinary aircraft fly up and down in the air by the aerodynamic force generated by wings, while deep-water aircraft use the hydrodynamic force generated by the relative movement between short wings on both sides and seawater to move forward while sinking or floating. Deep-water planes have always been unmanned. As for whether it can carry people, scientists have conducted research and demonstration. Finally, they think that if a "life support system" similar to that used by astronauts or divers is added to a deep-water plane, it can completely carry people, but the corresponding cost will increase greatly.

Verb (abbreviation for verb) hovercraft-full-scale maneuver

Air cushion aircraft is an aircraft that uses the compressor on the aircraft fuselage to inject air into the airbag apron under the aircraft fuselage to form an air mass with a certain thickness and pressure with seawater, so that the aircraft can be suspended at a certain height on the water surface for takeoff, landing and taxiing. When the plane is sailing on the water, the air cushion formed by the high-pressure air sprayed from several small nozzles under the airbag can make the plane take off quickly. After the plane takes off, put away the airbag.